LONDON — Royal officials released an estimated schedule Thursday for the April 29 royal wedding of Prince William and fiancee Kate Middleton at London’s Westminster Abbey.

Pack extra umbrellas! As wedding excitement heats up, the weather in London has cooled down.

Gray skies were forecast for Friday, with a 30 percent chance of rain at the time of the ceremony, the Meteorological Office said. Some sunshine might break through in the morning, with temperatures rising to about 66 degrees.

After 10 a.m. BST (1030 GMT; 530 a.m. EDT): The royal family begin to take their places at the Abbey, with Queen Elizabeth II and her husband the last to arrive. Prince William heads to the Abbey joined by his best man, Prince Harry.